CVE-2026-125265
MEDIUM
NVD
CVSS Score
5.3
Severity
MEDIUM
Published
Nov 09, 2026
Vendor
unknown
Description
FFmpeg through 9.0.2 contains a use-after-free vulnerability in libavcodec/nvdec.c because ff_nvdec_start_frame() fails to reset ctx->bitstream after slice errors. Attackers can supply crafted video that abandons a picture before end_frame, causing cuvidDecodePicture() to read freed heap memory, crashing applications or exposing stale heap contents.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25231
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/nvdec.c#L694
- https://github.com/FFmpeg/FFmpeg/commit/03cd7851955c023f1ff4c8a495d47e996d01485a
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-use-after-free-via-nvdec-stale-bitstream-pointer